Make English the repository working language (#5)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

packages/web/src/state/auth.tsx

@@ -75,6 +75,6 @@ export function AuthProvider({ children }: { children: ReactNode }) {
 
 export function useAuth(): AuthContextValue {
   const ctx = useContext(AuthContext);
-  if (!ctx) throw new Error("useAuth 必须在 AuthProvider 内使用");
+  if (!ctx) throw new Error("useAuth must be used within an AuthProvider");
   return ctx;
 }